Four Channel Receiver with Matrix Decoding (1972-74)
Four channel finally comes of age with this versatile receiver from Pioneer, an outstanding achievement unusual in both capability and tremendous power output.
Featuring a unique matrix decoding circuit, that reproduces all regular matrix records, as well as a second type of decoding circuitry for the SQ matrixed type of records, the QX-9900 is simply the most complete receiver for four channel now available today.
In addition to it's matrix decoding capability, the QX-9900 may also be used for discrete four-channel reproduction as well as more conventional two-channel reproduction.
It's FM tuner characteristics are equally superb, distinguished by excellent sensitivity, a wide linear FM dial scale, and superb selectivity.
Carefully engineered to typically high Pioneer standards, the QX-9900 will give you many years of faithful musical reproduction.
It moves you into the fascinating sound world of four channel and even a bit beyond.
Tuning range: FM, MW
Power output: 33W/ch (stereo), 28W/ch into 8Ω (quadraphonic)
Frequency response: 10Hz to 20kHz
Total harmonic distortion: 0.5%
Damping factor: 50
Input sensitivity: 3.8mV (mic), 2.9mV (MM), 200mV (DIN), 200mV (line)
Signal to noise ratio: 75dB (MM), 85dB (line)
Output: 200mV (line), 35mV (DIN)
Speaker load impedance: 4Ω to 16Ω
Semiconductors: 8 x FET, 4 x IC, 113 x transistors, 62 x diodes
Dimensions: 560 x 170 x 430mm
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Reviewed Aug 22nd, 2014 by marceloxxx007xxx007
Very nice blue panel , but to be perfevt had to increase the power amplifier to minimum 60 watts x 4 ...And stereo to 80 watts....His construction is top superior in details...Very nice...